Question

the percent of college students marijuana use for a sample of 93,818 students is shown in the accompanying pie chart. find the probability of each event listed in parts (a) through (d) below. click the icon to view the pie chart. (a) randomly selecting a student who never used marijuana the probability is 53.3%. (round to one decimal place as needed.) (b) randomly selecting a student who used marijuana the probability is 46.7%. (round to one decimal place as needed.) (c) randomly selecting a student who used marijuana between 1 and 29 the probability is 17.0%. (round to one decimal place as needed.) (d) randomly selecting a student who used marijuana on at least 1 of the the probability is %. (round to one decimal place as needed.)

Explanation:

Step1: Understand the meaning of "used marijuana on at least 1 of the last 30 days"

It means the sum of "Used, but not in the last 30 days", "Used 1 - 9 days", "Used 10 - 29 days", and "Used all 30 days".

Step2: Calculate the probability

Add the percentages of these four categories: \(27.0\%+12.0\% + 5.0\%+1.7\%=45.7\%\)

Answer:

\(45.7\%\)